CT600 supplementary pages

Supported HMRC supplementary pages for CT600 returns.

Robocount treats supplementary pages as part of the Corporation Tax engine. Each supported page is connected to the CT600 workflow, computation logic, review trail, and HMRC filing output.

CT600A loans to participators

Close company loans, s455 tax, repayments, releases, and relief tracking.

Indicator box 95

CT600B controlled foreign companies

CFC charge data, hybrid mismatch indicators, and related Corporation Tax disclosures.

Indicator box 100

CT600C group relief

Group relief claims, surrendered losses, carried-forward claims, and consent detail.

Indicator box 105

CT600D insurance companies

Insurance company indicators and investment income and expense detail.

Indicator box 110

CT600E charities and CASCs

Charity and Community Amateur Sports Club exemptions, claims, and repayment data.

Indicator box 115

CT600F tonnage tax

Tonnage tax election cases and the related CT600 supplementary disclosure.

Indicator box 120

CT600G Northern Ireland

Northern Ireland company indicators and Corporation Tax reporting fields.

Indicator box 125

CT600H cross-border royalties

Royalty payments, treaty detail, withholding, and cross-border disclosure support.

Indicator box 130

CT600I ring fence trades

Ring fence trade calculations, supplementary charge, and related oil and gas fields.

Indicator box 135

CT600J tax avoidance schemes

DOTAS scheme entries and disclosure details for relevant CT600 returns.

Indicator box 140

CT600K restitution tax

Restitution interest and tax charged under the CT600K supplementary page.

Specialist tax cases

CT600L R&D relief

RDEC, SME/ERIS style credit details, payable credit steps, and R&D claim support.

R&D credit detail

CT600M freeports

Freeport tax site detail, qualifying activity, and supplementary page data.

Freeport cases

CT600N RPDT

Residential Property Developer Tax, adjusted development profit, allowance, and RPDT payable.

RPDT cases

CT600P creative industries

Creative industry relief, AVEC/VGEC, production-level detail, and payable credit cascade support.

Creative industries